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// Copyright (c) 2015-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "zmqnotificationinterface.h"
#include "zmqpublishnotifier.h"
#include "version.h"
#include "validation.h"
#include "streams.h"
#include "util.h"
void zmqError(const char *str)
{
LogPrint("zmq", "zmq: Error: %s, errno=%s\n", str, zmq_strerror(errno));
}
CZMQNotificationInterface::CZMQNotificationInterface() : pcontext(NULL)
{
}
CZMQNotificationInterface::~CZMQNotificationInterface()
{
Shutdown();
for (std::list<CZMQAbstractNotifier*>::iterator i=notifiers.begin(); i!=notifiers.end(); ++i)
{
delete *i;
}
}
CZMQNotificationInterface* CZMQNotificationInterface::Create()
{
CZMQNotificationInterface* notificationInterface = NULL;
std::map<std::string, CZMQNotifierFactory> factories;
std::list<CZMQAbstractNotifier*> notifiers;
factories["pubhashblock"] = CZMQAbstractNotifier::Create<CZMQPublishHashBlockNotifier>;
factories["pubhashtx"] = CZMQAbstractNotifier::Create<CZMQPublishHashTransactionNotifier>;
factories["pubrawblock"] = CZMQAbstractNotifier::Create<CZMQPublishRawBlockNotifier>;
factories["pubrawtx"] = CZMQAbstractNotifier::Create<CZMQPublishRawTransactionNotifier>;
for (std::map<std::string, CZMQNotifierFactory>::const_iterator i=factories.begin(); i!=factories.end(); ++i)
{
std::string arg("-zmq" + i->first);
if (IsArgSet(arg))
{
CZMQNotifierFactory factory = i->second;
std::string address = GetArg(arg, "");
CZMQAbstractNotifier *notifier = factory();
notifier->SetType(i->first);
notifier->SetAddress(address);
notifiers.push_back(notifier);
}
}
if (!notifiers.empty())
{
notificationInterface = new CZMQNotificationInterface();
notificationInterface->notifiers = notifiers;
if (!notificationInterface->Initialize())
{
delete notificationInterface;
notificationInterface = NULL;
}
}
return notificationInterface;
}
// Called at startup to conditionally set up ZMQ socket(s)
bool CZMQNotificationInterface::Initialize()
{
LogPrint("zmq", "zmq: Initialize notification interface\n");
assert(!pcontext);
pcontext = zmq_init(1);
if (!pcontext)
{
zmqError("Unable to initialize context");
return false;
}
std::list<CZMQAbstractNotifier*>::iterator i=notifiers.begin();
for (; i!=notifiers.end(); ++i)
{
CZMQAbstractNotifier *notifier = *i;
if (notifier->Initialize(pcontext))
{
LogPrint("zmq", " Notifier %s ready (address = %s)\n", notifier->GetType(), notifier->GetAddress());
}
else
{
LogPrint("zmq", " Notifier %s failed (address = %s)\n", notifier->GetType(), notifier->GetAddress());
break;
}
}
if (i!=notifiers.end())
{
return false;
}
return true;
}
// Called during shutdown sequence
void CZMQNotificationInterface::Shutdown()
{
LogPrint("zmq", "zmq: Shutdown notification interface\n");
if (pcontext)
{
for (std::list<CZMQAbstractNotifier*>::iterator i=notifiers.begin(); i!=notifiers.end(); ++i)
{
CZMQAbstractNotifier *notifier = *i;
LogPrint("zmq", " Shutdown notifier %s at %s\n", notifier->GetType(), notifier->GetAddress());
notifier->Shutdown();
}
zmq_ctx_destroy(pcontext);
pcontext = 0;
}
}
void CZMQNotificationInterface::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload)
{
if (fInitialDownload || pindexNew == pindexFork) // In IBD or blocks were disconnected without any new ones
return;
for (std::list<CZMQAbstractNotifier*>::iterator i = notifiers.begin(); i!=notifiers.end(); )
{
CZMQAbstractNotifier *notifier = *i;
if (notifier->NotifyBlock(pindexNew))
{
i++;
}
else
{
notifier->Shutdown();
i = notifiers.erase(i);
}
}
}
void CZMQNotificationInterface::SyncTransaction(const CTransaction& tx, const CBlockIndex* pindex, int posInBlock)
{
for (std::list<CZMQAbstractNotifier*>::iterator i = notifiers.begin(); i!=notifiers.end(); )
{
CZMQAbstractNotifier *notifier = *i;
if (notifier->NotifyTransaction(tx))
{
i++;
}
else
{
notifier->Shutdown();
i = notifiers.erase(i);
}
}
}
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